<template>
  <Dialog :title="dialogTitle" v-model="dialogVisible">
    <el-form
      ref="formRef"
      :model="formData"
      :rules="formRules"
      label-width="100px"
      v-loading="formLoading"
    >
      <el-form-item label="服务名称" prop="serviceName">
        <el-input v-model="formData.serviceName" placeholder="请输入服务名称" />
      </el-form-item>
      <el-form-item label="服务标识" prop="serviceCode">
        <el-input v-model="formData.serviceCode" placeholder="请输入服务标识" />
      </el-form-item>
      <el-form-item label="服务类型" prop="serviceType">
        <el-select v-model="formData.serviceType" placeholder="请选择服务类型">
          <el-option
            v-for="dict in getIntDictOptions(DICT_TYPE.SYSTEM_SERVICE_TYPE)"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="服务简介" prop="description">
        <el-input v-model="formData.description" type="textarea" placeholder="请输入服务简介" />
      </el-form-item>
      <el-form-item label="有效天数" prop="validDays">
        <el-input type="number" v-model="formData.validDays" placeholder="请输入有效天数" />
      </el-form-item>
      <el-form-item label="菜单权限" prop="formData.menuPerm">
        <el-card class="cardHeight">
          <template #header>
            全选/全不选:
            <el-switch
              v-model="menuOptions.treeNodeAll"
              active-text="是"
              inactive-text="否"
              inline-prompt
              @change="handleCheckedTreeNodeAll"
            />
            全部展开/折叠:
            <el-switch
              v-model="menuOptions.menuExpand"
              active-text="展开"
              inactive-text="折叠"
              inline-prompt
              @change="handleCheckedTreeExpand"
            />
          </template>
          <el-tree
            ref="treeRef"
            :data="menuOptions.treeData"
            :props="defaultProps"
            empty-text="加载中，请稍候"
            node-key="id"
            show-checkbox
          />
        </el-card>
      </el-form-item>
    </el-form>
    <template #footer>
      <el-button @click="submitForm" type="primary" :disabled="formLoading">确 定</el-button>
      <el-button @click="dialogVisible = false">取 消</el-button>
    </template>
  </Dialog>
</template>
<script setup lang="ts">
import { DICT_TYPE, getIntDictOptions } from '@/utils/dict'
import * as ServiceApi from '@/api/system/service'
import { ElTree } from 'element-plus'
import { defaultProps, handleTree } from '@/utils/tree'
import * as MenuApi from '@/api/system/menu'
import Node from 'element-plus/es/components/tree/src/model/node'
const { t } = useI18n() // 国际化
const message = useMessage() // 消息弹窗

const dialogVisible = ref(false) // 弹窗的是否展示
const dialogTitle = ref('') // 弹窗的标题
const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
const formType = ref('') // 表单的类型：create - 新增；update - 修改
const formData = ref({
  id: undefined,
  serviceName: undefined,
  serviceCode: undefined,
  serviceType: undefined,
  description: undefined,
  validDays: undefined,
  menuIds: [] // 树组件权限树的数据
})
// 菜单权限树的相关数据管理
const menuOptions = reactive<{
  treeNodeAll: boolean
  menuExpand: boolean
  treeData: Node[]
}>({
  treeNodeAll: false, // 全选 / 不选
  menuExpand: false, // 是否折叠
  treeData: [] // 树组件的数据
})
const treeRef = ref<InstanceType<typeof ElTree>>() // 树组件 Ref

const formRules = reactive({
  serviceName: [{ required: true, message: '服务名称不能为空', trigger: 'blur' }],
  serviceCode: [{ required: true, message: '服务标识不能为空', trigger: 'blur' }],
  serviceType: [{ required: true, message: '服务类型不能为空', trigger: 'change' }],
  validDays: [{ required: true, message: '有效天数不能为空', trigger: 'blur' }],
  menuIds: [{ required: true, message: '菜单权限不能为空', trigger: 'blur' }]
})
const formRef = ref() // 表单 Ref

/** 打开弹窗 */
const open = async (type: string, id?: number) => {
  dialogVisible.value = true
  dialogTitle.value = t('action.' + type)
  formType.value = type
  resetForm()
  // 加载 Menu 列表。注意，必须放在前面，不然下面 setChecked 没数据节点
  menuOptions.treeData = handleTree(await MenuApi.getSimpleMenusList())
  // 修改时，设置数据
  if (id) {
    formLoading.value = true
    try {
      const res = await ServiceApi.getService(id)
      res.menuIds = res.menuIds.split(',')
      formData.value = res
      // 设置选中
      res.menuIds.forEach((menuId: number) => {
        treeRef.value?.setChecked(menuId, true, false)
      })
    } finally {
      formLoading.value = false
    }
  }
}
defineExpose({ open }) // 提供 open 方法，用于打开弹窗

/** 提交表单 */
const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
const submitForm = async () => {
  // 校验表单
  if (!formRef) return
  const valid = await formRef.value.validate()
  if (!valid) return
  // 提交请求
  formLoading.value = true
  try {
    const data = formData.value as unknown as ServiceApi.ServiceVO
    data.menuIds = [
      ...(treeRef.value?.getCheckedKeys(false) as unknown as Array<number>), // 获得当前选中节点
      ...(treeRef.value?.getHalfCheckedKeys() as unknown as Array<number>) // 获得半选中的父节点
    ].join(',')
    if (formType.value === 'create') {
      await ServiceApi.createService(data)
      message.success(t('common.createSuccess'))
    } else {
      await ServiceApi.updateService(data)
      message.success(t('common.updateSuccess'))
    }
    dialogVisible.value = false
    // 发送操作成功的事件
    emit('success')
  } finally {
    formLoading.value = false
  }
}

/** 重置表单 */
const resetForm = () => {
  formData.value = {
    id: undefined,
    serviceName: undefined,
    serviceCode: undefined,
    serviceType: undefined,
    description: undefined,
    validDays: undefined,
    menuIds: []
  }
  formRef.value?.resetFields()
}

/** 全选/全不选 */
const handleCheckedTreeNodeAll = () => {
  treeRef.value?.setCheckedNodes(menuOptions.treeNodeAll ? menuOptions.treeData : [])
}

/** 展开/折叠全部 */
const handleCheckedTreeExpand = () => {
  const nodes = treeRef.value?.store.nodesMap
  for (let node in nodes) {
    if (nodes[node].expanded === menuOptions.menuExpand) {
      continue
    }
    nodes[node].expanded = menuOptions.menuExpand
  }
}
</script>
